bdscr_t blocks[256]; // 256 * 32 bytes = 8KB Use:
Reduced alignment to 4 bytes, changed static array to pointer + malloc, and moved non-critical descriptors to a compressed filesystem. bloat bdscr
objcopy --remove-section=.bdscr firmware.elf stripped.elf Scenario: A Zigbee IoT hub firmware had a .bdscr section of 64KB, but only 2KB was actually used. bdscr_t blocks[256]; // 256 * 32 bytes =
Example bloaty command:
.bdscr : KEEP(*(.bdscr)) . = ALIGN(4096); // Over-alignment > FLASH With: // Over-alignment >
Always audit your linker scripts and descriptor data structures – especially when porting code across different flash architectures or toolchains.
gcc -DNDEBUG -ffunction-sections -fdata-sections ... ld --gc-sections -o output.elf input.o Or manually strip after linking: